[INFO] fetching crate pdf_structure_viewer 0.1.0...
[INFO] checking pdf_structure_viewer-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate pdf_structure_viewer 0.1.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate pdf_structure_viewer 0.1.0
[INFO] finished tweaking crates.io crate pdf_structure_viewer 0.1.0
[INFO] tweaked toml for crates.io crate pdf_structure_viewer 0.1.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate pdf_structure_viewer 0.1.0 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate pdf_structure_viewer 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b9feeef918ec7e9b7d24b6d4bc772b9ed25c86f85d561ae7624957a85f6ae62
[INFO] running `Command { std: "docker" "start" "-a" "8b9feeef918ec7e9b7d24b6d4bc772b9ed25c86f85d561ae7624957a85f6ae62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b9feeef918ec7e9b7d24b6d4bc772b9ed25c86f85d561ae7624957a85f6ae62", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b9feeef918ec7e9b7d24b6d4bc772b9ed25c86f85d561ae7624957a85f6ae62", kill_on_drop: false }`
[INFO] [stdout] 8b9feeef918ec7e9b7d24b6d4bc772b9ed25c86f85d561ae7624957a85f6ae62
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Dunmustuse_in_always_ok" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d89d198c3654b2c476607817816550802d3b21b084e0339b0292d4ed9385c178
[INFO] running `Command { std: "docker" "start" "-a" "d89d198c3654b2c476607817816550802d3b21b084e0339b0292d4ed9385c178", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]     Checking encoding_index_tests v0.1.4
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling lexical-core v0.7.6
[INFO] [stderr]    Compiling const_fn v0.4.9
[INFO] [stderr]    Compiling crc32fast v1.3.0
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling quote v1.0.14
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]     Checking funty v1.1.0
[INFO] [stderr]     Checking ryu v1.0.9
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking encoding-index-tradchinese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-japanese v1.20141219.5
[INFO] [stderr]     Checking encoding-index-korean v1.20141219.5
[INFO] [stderr]     Checking encoding-index-singlebyte v1.20141219.5
[INFO] [stderr]     Checking encoding-index-simpchinese v1.20141219.5
[INFO] [stderr]     Checking weezl v0.1.5
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking yansi v0.5.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking encoding v0.2.33
[INFO] [stderr]     Checking bitvec v0.19.6
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling time-macros-impl v0.1.2
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking time-macros v0.1.1
[INFO] [stderr]     Checking structopt v0.3.25
[INFO] [stderr]     Checking lopdf v0.27.0
[INFO] [stderr]     Checking pdf_structure_viewer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ObjectPrintInfo`
[INFO] [stdout]  --> src/print_tree/mod.rs:9:46
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use pdf_objects::{get_object_print_info, ObjectPrintInfo};
[INFO] [stdout]   |                                              ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `ObjectPrintInfo`
[INFO] [stdout]  --> src/print_tree/mod.rs:9:46
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub use pdf_objects::{get_object_print_info, ObjectPrintInfo};
[INFO] [stdout]   |                                              ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pdf_structure_viewer` (bin "pdf_structure_viewer" test) due to 1 previous error; 1 warning emitted
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | /         /// Print tree, but only expend from this node.
[INFO] [stdout] 51 | |         ///
[INFO] [stdout] 52 | |         /// Each item should be separated by a dot (`.`)
[INFO] [stdout] 53 | |         /// Example: `Root.Pages.Kids`
[INFO] [stdout] 54 | |         #[structopt(short, long)]
[INFO] [stdout] 55 | |         expand: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | /         /// Print tree, but only expend from this node.
[INFO] [stdout] 51 | |         ///
[INFO] [stdout] 52 | |         /// Each item should be separated by a dot (`.`)
[INFO] [stdout] 53 | |         /// Example: `Root.Pages.Kids`
[INFO] [stdout] 54 | |         #[structopt(short, long)]
[INFO] [stdout] 55 | |         expand: Option<String>,
[INFO] [stdout]    | |______________________________^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `pdf_structure_viewer` (bin "pdf_structure_viewer") due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "d89d198c3654b2c476607817816550802d3b21b084e0339b0292d4ed9385c178", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d89d198c3654b2c476607817816550802d3b21b084e0339b0292d4ed9385c178", kill_on_drop: false }`
[INFO] [stdout] d89d198c3654b2c476607817816550802d3b21b084e0339b0292d4ed9385c178